#include<bits/stdc++.h>
#define pb push_back
#define mp make_pair
using namespace std;
const int mod = 998244353;
struct SEGT{
vector<int> tree, lazy;
void init(int n){
tree.assign(4*n, 0);
lazy.assign(4*n, 0);
}
void push(int ind){
tree[ind*2] += lazy[ind];
tree[ind*2+1] += lazy[ind];
lazy[ind*2] += lazy[ind];
lazy[ind*2+1] += lazy[ind];
lazy[ind] = 0;
}
void update(int ind, int l, int r, int ql, int qr, int val){
if(l > r || l > qr || r < ql) return;
if(l == r || (ql <= l && r <= qr)){
tree[ind] += val;
lazy[ind] += val;
}
else{
push(ind);
int m = (l + r)/2;
update(ind*2, l, m, ql, qr, val);
update(ind*2+1, m+1, r, ql, qr, val);
tree[ind] = max(tree[ind*2], tree[ind*2+1]);
}
}
int query(int ind, int l, int r, int ql, int qr){
if(l > r || l > qr || r < ql) return 0;
if(l >= ql && r <= qr) return tree[ind];
else{
push(ind);
int m = (l + r)/2;
return max(query(ind*2, l, m, ql, qr), query(ind*2+1, m+1, r, ql, qr));
}
}
};
int main(){
int n;
cin>>n;
vector<pair<int, int> > a(n);
set<int> ste;
for(int i = 0; i < n; i++){
int l, r;
cin>>l>>r;
ste.insert(l);
ste.insert(r);
a[i] = mp(l, r);
}
map<int, int> conv;
int val = 1;
for(auto itr: ste){
conv[itr] = val;
val++;
}
for(int i = 0; i < n; i++){
a[i] = mp(conv[a[i].first], conv[a[i].second]);
}
int N = val + 5;
SEGT seg;
seg.init(N);
vector<int> go(n);
int r = 0;
for(int l = 0; l < n; l++){
while(r < n && seg.query(1, 1, N, a[r].first, a[r].second) == 0){
seg.update(1, 1, N, a[r].first, a[r].second, 1);
r++;
}
go[l] = r;
seg.update(1, 1, N, a[l].first, a[l].second, -1);
}
int K = 18;
vector<vector<int> > lift(K, vector<int>(n+1));
for(int i = 0; i < n; i++){
lift[0][i] = go[i];
}
lift[0][n] = n;
for(int i = 1; i < K; i++){
for(int j = 0; j <= n; j++){
lift[i][j] = lift[i-1][lift[i-1][j]];
}
}
int q;
cin>>q;
while(q--){
int l, r;
cin>>l>>r;
int ans = 1;
l--, r--;
for(int i = K-1; i >= 0; i--){
if(lift[i][l] <= r){
l = lift[i][l];
ans += (1 << i);
}
}
cout<<ans<<endl;
}
return 0;
}
Compilation message
Main.cpp:26:2: error: extended character is not valid in an identifier
26 | if(l == r || (ql <= l && r <= qr)){
| ^
Main.cpp:26:5: error: extended character is not valid in an identifier
26 | if(l == r || (ql <= l && r <= qr)){
| ^
Main.cpp:26:8: error: extended character is not valid in an identifier
26 | if(l == r || (ql <= l && r <= qr)){
| ^
Main.cpp:26:11: error: extended character is not valid in an identifier
26 | if(l == r || (ql <= l && r <= qr)){
| ^
Main.cpp: In member function 'void SEGT::update(int, int, int, int, int, int)':
Main.cpp:26:2: error: '\U000000a0' was not declared in this scope
26 | if(l == r || (ql <= l && r <= qr)){
| ^
Main.cpp:30:9: error: 'else' without a previous 'if'
30 | else{
| ^~~~
